de Havilland DH-4 &auot;Liberty Plane" – A British designed and American built (under contract) landplane with a 400-hp Liberty engine. The DH-4 served with Marine Squadrons at Le Fresne. Note USMC insignia on fuselage. It was usually added to the rear fuselage prior to the first combat flight. (AAHS photo archives, Gerald Balzer collection)